docs: def set_association_id(self, assoc_id=None):
          """
          This will set the association ID based on the internal parts
          of the association.
          To be used in cases where an external association identifier
          should be used.
  
          :param assoc_id:
  
          :return:
  
          """
          if assoc_id is None:
              self.assoc_id = self.make_association_id(
                  self.definedby, self.sub, self.rel, self.obj)
          else:
              self.assoc_id = assoc_id
  
          return self.assoc_id